Spent a night out with the 6-inch refractor, and spent a pleasant evening scooping up Struves, mostly in the far northern latitudes where the 20-inch is blocked from seeing. It was a bit hazy and seeing was only average, but a good haul all the same.
STF1169 AB: 152; 125x: Wide, >1 Dm. SOC has a grade 5 orbit, but there is no parallax range overlap, -15%, it is not binary.
08h 16m 31.05s +79° 30' 03.5" P.A. 15.00 sep 20.6 mag 8.40,8.64 Sp G0 dist. 45 pc (146.79 l.y.)
STF1523 AB: 152; 125x: Hairline split, 1 Dm, nice. Alula australis. SOC grade 1 orbit 59.98-year orbit, it will make a quarter turn from SSE to E by 2045, widening slightly.
11h 18m 10.90s +31° 31' 45.0" P.A. 148.80 sep 2.2 mag 4.33,4.80 Sp F9V+G9V dist. 10.42 pc (33.99 l.y.)
STF1576 AB: 152; 125x: Nearly 1 Dm, well split. There is 50% parallax range overlap, 833 AU weighted separation, 1.5+1.4 Msol, so it might be binary and an orbit should be tried.
11h 52m 52.60s +30° 49' 38.4" P.A. 241.00 sep 5.3 mag 9.11,9.45 Sp F5 dist. 163.67 pc (533.89 l.y.)
STF1583 AB: 152; 125x: 1 Dm, pretty wide. 87% overlap of the parallax ranges, 2,453 AU weighted separation, 2.2+1.7 Msol, likely binary and an orbit should be tried.
12h 00m 10.43s +86° 59' 40.0" P.A. 284.00 sep 11.3 mag 8.10,9.29 Sp A2V dist. 289.02 pc (942.78 l.y.)
STF1625 AB: 152; 125x: White, slightly unequal stars, wide. Also seen with 60mm telescope. 19% overlap of the parallax ranges, 1,232 AU weighted separation, 1.7+1.5 Msol, and the radial velocity delta 0.5 is less than the escape velocity 2.2, it is likely binary and needs an orbit
12h 16m 11.66s +80° 07' 30.3" P.A. 217.00 sep 14.5 mag 7.24,7.78 Sp F1V+F3V dist. 497.51 pc (1622.88 l.y.)
STF1694 AB: 152; 125x: White near equal stars, wide, also seen with 60mm scope. -6% parallax range overlap, it is not likely binary.
12h 49m 13.80s +83° 24' 46.3" P.A. 324.00 sep 21.8 mag 5.29,5.74 Sp A1IIIsh dist. 178.89 pc (583.54 l.y.)
STF1720 AB: 152; 200x: Split with seeing, near equal stars. 6% parallax range overlap, 590 AU weighted separation, 2.3+2.2 Msol, it is possibly binary and an orbit should be tried.
12h 59m 12.92s +82° 56' 05.4" P.A. 329.00 sep 1.7 mag 8.91,9.18 Sp A0
STF1745 AB: 152; 125x: B appears with averted vision only, white. -94% parallax range overlap, it is not binary.
13h 20m 17.23s +79° 26' 13.1" P.A. 182.00 sep 19.3 mag 8.92,11.60 Sp G5
STF1787 AB: 152; 150x: B with averted vision only, tough, closely split. -12% parallax range overlap, it is not binary.
13h 40m 38.33s +81° 10' 51.0" P.A. 335.00 sep 2.0 mag 9.59,11.00 Sp F8 dist. 448.43 pc (1462.78 l.y.)
STF1822 AB: 152; 125x: Significant delta, wide, faint B brightens with averted vision. -93% parallax range overlap, it is not binary.
14h 09m 37.57s +72° 50' 04.3" P.A. 52.00 sep 15.0 mag 9.15,10.80 Sp K2
STF1836 AB: 152; 125x: Wide, significant delta. -47% parallax range overlap, it is not binary.
14h 17m 48.71s +69° 18' 49.2" P.A. 110.00 sep 21.6 mag 10.74,11.25 Sp G0+F4
STF1840 AB: 152; 125x: Wide, significant delta. -20% parallax range overlap, it is not binary.
14h 19m 54.86s +67° 46' 56.9" P.A. 221.00 sep 27.2 mag 6.95,10.05 Sp B9V dist. 142.65 pc (465.32 l.y.)
STF1841 AB: 152; 125x: Wide, very faint, need averted vision to draw them out, then can barely hold them direct vision. -67% parallax range overlap, it is not binary.
14h 21m 07.78s +67° 48' 10.4" P.A. 264.00 sep 35.0 mag 7.32,11.07 Sp A2 dist. 164.2 pc (535.62 l.y.)
STF1844 AB: 152; 200x: A bump or snowman from the main star, very faint, very tough, with seeing. 73% parallax range overlap, only 302 AU weighted separation, 1.3+1.0 Msol, it is likely binary and needs an orbit.
14h 17m 43.93s +76° 47' 46.8" P.A. 209.00 sep 1.9 mag 9.77,10.89 Sp G5 dist. 194.17 pc (633.38 l.y.)
STF1849 AB: 152; 200x: B seen with averted and brightens next to the primary star, barely split. 24% parallax range overlap, 137 AU weighted separation, 1.3+1.2 Msol, it is possibly binary and needs an orbit.
14h 19m 49.36s +76° 42' 02.4" P.A. 10.00 sep 0.9 mag 9.70,10.09 Sp F5 dist. 146.63 pc (478.31 l.y.)
STF1851 AB: 152; 125x: Very faint, just barely seen with direct vision, well split, significant delta magnitude. -46% parallax range overlap, it is not binary.
14h 17m 11.18s +79° 51' 38.0" P.A. 329.00 sep 10.5 mag 9.78,12.30 Sp F8
STF1859 AB: 152; 125x: Near equal wide pair. -21% parallax range overlap, it is not binary.
14h 28m 31.85s +73° 03' 18.3" P.A. 234.00 sep 19.9 mag 8.63,10.12 Sp A2 dist. 2857.14 pc (9319.99 l.y.)
STF1880 AB: 152; 125x: Very faint B seen with averted vision, wide. -83% parallax range overlap, it is not binary.
14h 33m 15.18s +79° 46' 26.4" P.A. 254.00 sep 26.1 mag 10.42,11.73
STF1897 AB: 152; 125x: Wide near equal pair. -65% parallax range overlap, it is not binary.
14h 53m 35.35s +69° 45' 46.1" P.A. 319.00 sep 35.9 mag 7.61,10.99 Sp K5 dist. 636.94 pc (2077.7 l.y.)
STF1905 AB: 152; 200x: Near equal, nice close split. 77% parallax range overlap, only 218 AU weighted separation, 1.1+1.1 Msol, it is possibly binary and needs an orbit.
14h 56m 47.88s +70° 49' 58.5" P.A. 163.00 sep 3.0 mag 9.05,9.43 Sp F8 dist. 58.62 pc (191.22 l.y.)
STF1906 AB: 152; 125x: Near equal wide. -91% parallax range overlap, it is not binary.
14h 58m 21.74s +71° 08' 26.8" P.A. 204.00 sep 17.0 mag 8.48,10.18 Sp F5
STF1915 AB: 152; 200x: Nearly one delta, very closely split. -74% parallax range overlap, it is not binary.
14h 33m 17.54s +85° 56' 18.4" P.A. 319.00 sep 2.4 mag 7.33,9.69 Sp K0 dist. 179.53 pc (585.63 l.y.)
STF1928 AB: 152; 125x: Near equal, well split. -6% parallax range overlap, it is not binary.
15h 09m 17.20s +72° 27' 16.4" P.A. 275.00 sep 6.5 mag 9.56,10.24 Sp G5
STF1933 AB: 152; 125x: 1 Dm, wide B seen with averted vision only. 5% parallax range overlap, 4,338 AU weighted separation, 1.5+0.9 Msol, but the radial velocity delta 2.3 far exceeds the escape velocity 1.0, it is not binary.
15h 05m 14.43s +79° 03' 34.1" P.A. 276.00 sep 24.2 mag 9.43,11.75 Sp G0 dist. 143.88 pc (469.34 l.y.)
STF1958 AB: 152; 125x: Near equal wide pair. 24% parallax range overlap, 6,188 AU weighted separation, 1.5+1.4 Msol, so there is some possibility it is binary and an orbit should be tried.
15h 29m 24.12s +67° 12' 16.0" P.A. 337.00 sep 29.6 mag 9.63,9.97 Sp G5
STF1971 AB: 152; 125x: Wide faint B seen with averted vision. -97% parallax range overlap, it is not binary.
15h 35m 12.91s +75° 20' 16.4" P.A. 317.00 sep 15.0 mag 9.64,11.99 Sp K5
STF1972 AB: 152; 125x: Near equal, wide, easy. -11% parallax range overlap, it is not binary.
15h 29m 11.19s +80° 26' 55.0" P.A. 80.00 sep 31.6 mag 6.64,7.30 Sp G0IV-V dist. 21.85 pc (71.27 l.y.)
STF1980 AB: 152; 125x: Easy near equal pair. -74% parallax range overlap, it is not binary.
15h 32m 27.04s +81° 03' 10.4" P.A. 49.00 sep 10.1 mag 9.15,9.52 Sp F0
STF1989 AB: 152; 200x: Very strongly notched elongation, hairline split at best seeing moments. No Gaia data for the secondary, SOC gives a grade 3 orbit 171.62-year period, it will close somewhat by 2040.
15h 39m 38.61s +79° 58' 59.6" P.A. 20.90 sep 0.6 mag 7.32,8.15 Sp F2V dist. 120.05 pc (391.6 l.y.)
STF1997 AB: 152; 125x: 1 Dm, wide, B with averted vision only. -95% parallax range overlap, it is not binary.
15h 47m 52.79s +77° 46' 08.8" P.A. 339.00 sep 18.3 mag 9.31,12.16 Sp K0
STF2002 AB: 152; 125x: Nearly 1 Dm, wide. -92% parallax range overlap, it is not binary.
15h 47m 36.09s +83° 16' 25.7" P.A. 314.00 sep 42.5 mag 8.81,10.61 Sp F5
STF2013 AB: 152; 125x: Wide, nearly 1 Dm, B brightens with averted vision. -96% parallax range overlap, it is not binary.
15h 57m 14.53s +76° 28' 44.3" P.A. 274.00 sep 20.6 mag 10.02,11.01 Sp K0
STF2020 AB: 152; 150x: Wide faint B seen with averted vision only. -96% parallax range overlap, it is not binary.
16h 00m 00.11s +76° 15' 22.7" P.A. 244.00 sep 26.6 mag 9.86,10.80 Sp G5
STF2034 AB: 152; 200x: Split with seeing, equal magnitude. 11% parallax range overlap, 338 AU weighted separation, 2.7+3.1 Msol, so it might be binary and an orbit should be tried.
15h 48m 43.02s +83° 37' 10.5" P.A. 110.00 sep 1.1 mag 7.68,7.95 Sp A3 dist. 381.68 pc (1245.04 l.y.)
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